The contactless infrared thermometer from One Beat Medical instantly measures body temperature from a safe distance by receiving infrared wavelengths. Just align the detection window with the forehead to measure body temperature quickly and accurately. With a large LCD screen, high-definition tri-color backlight (green for normal temperature, yellow for alert temperature, red for fever), and clear display, you'll get readings accurately and quickly. Store up to 32 sets of measurements. Requires 2 AAA Batteries (not included).